<ion-header>
    <ion-toolbar color="customblue" (click)="close('404')">
      <ion-buttons slot="start">
        <ion-back-button class="back-icon" text="" defaultHref="/"></ion-back-button>
      </ion-buttons>
      <ion-title>人脸识别</ion-title>
    </ion-toolbar>
  </ion-header>
<ion-content>
    <img  id="img"/>
</ion-content>
